Does 'customer service' need to be capitalized?

Depends on what the context is. Addressing a "Customer Service Representative," as a proper title, yes. I spoke with the "customer service department,"; then probably not. read more

Excess capitalization hinders an argument’s clarity. We’d allow an exception for something like your directory, where corporate politics might be a factor: In promotional or ceremonial contexts such as a displayed list of donors in the front matter of a book or a list of corporate officers in an annual report, titles are usually capitalized even when following a personal name. read more

We recently revised our blog “When to Capitalize People’s Titles” to reflect that titles may be either capitalized or lowercased in the complimentary close of a letter. However, when considering the “acting” portion of the signature line you are considering, our Grammar Rules for Capitalization section advises that occupations or job descriptions are not the same as titles and should not be capitalized. read more